Improvement in the construction of rolls tor rolling metal



UNITED STATES I PATENT GITEICE..l

DAVID REEVES, 0E PEcE'NIXvILLE, AssIGNoa To PPIcENIX'IEoN COMPANY,

' or PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN'THE CONSTRUCTION OF- ROILS TOR ROLLING METAL'.

slimme-anon for'ming pm ofiileaersratem N O. 39,869, dagen June 9, 1863.

To ,alla/tem it may' concern:

Een known that I, DAVID REEVES, of Ph.

nixville, in the county of Chester and State'of Pennsylvania, haveinvented a new and'Improved Manner -of Making a Compound Roll of WroughtandGast Iron; and I do hereby declare the following to'be a full,clear,`and

exact description ofthe manner of making the'same, reference beingahadto lthe accompanying draiyings, making a part of this speciticatiominivhich` Figure l represents an end View of a fagot 'or pile ofwrought-iron, which, Awhen welded, becomes the-central portion of theroll. Fig.

Vention 'is -to overcome this diiiiculty, and I.,

have effected it by adopting the mode h 'ereinl after described ofconstructing such. rolls.

I first take a -ronnd shaft, A, of wroughtiron, of suitable diameter-saysix or seven' inches--and-surround it byl other beveled shaped pieces ofWrought-iron, Bof a segmental form, as shown in Figs. l aud--2. Thesepie'c'es are held in place by the bands() U C, as shown i-nFig. 2. Thepile'thus formed is charged into a heating-furnaceand brought up vto aWelding-heat. It'isthen Withdrawn from the furnace and passed betweenrollers, by Which'process the pieces arewelded into one solid mass, thepile being reduced some; what in diameter, and correspondingly increasedin length, Tvhile the grain of the ironlie's inthe direction which4gives vthegreatest power to resist torsion or transverse strains.

After' welding and rolling', I place the shaft in a lathe, f orjtbepurpose of reducing its surface toa true circle, and afterward make sev,eral circular and longitudinal channels a b on the perimeter ofthe'piece, as shown in Fig. 8.-

, When the shaft or centerof the roll is thu-s prepared, In make a moldin a flask of'thesize and form required for the roller, as I would 4WereI about to make a solid cast-irou'roller. yThe flask is'theu placed inan upright posi-v tion, having one end openlsuiicient to admit thewrought-iron shaft. Havingfthusfpr- .pared theA flask, the Wrought-ironshaft 'is placed on bearings and a coal or Nood fire is built around it,and it is heated up to a bright cherry-red. At this stage of the processthe 4metal intended for casting around the shaft is Ain a molten state.'YWhen the shaft is hot en0ugh,it. is hoistedfrom the iire,and is letdotviiinto the center of the mold and secured in plape, and thuspreparedthe molten metal D is poured intothe-mold around the shaftuutilthe mold is filled. The molten metal enters intoand llsthe circularand longitudinal channels. of the Wrought-iron shaft, as

also the vacant space around it. When cooled,`

the roller is taken .out of the ask, and the cast-iron envelope is foundto be thoroughly fastened vupon thewroug'htfiron center. The roller isthen ready for being. turned up "in a lathe, and for receiving itsgrooves in the usual manner practiced in rollturning. The cast-iron maybe sufficiently thick to'permit the grooves being made. in itwithout-.reaching to the depth of the Wrought-iron, while theWrought-iron` shaft may be sutieiently thick to make the full diameterrequired for the journals where its superior .strength over cast-ironprevents thegreat strain upon the rollers in the process of rolling frombreaking at their necks, as is frequently the ease with rollers madeentirely of east-iron. A- compound roller of Wrought andfcast iron isthus perfectly made; the wroughtirn, having-been heated to the limit ofits expansion, contracts with the cast metal, thus relieving the enormous strainA that the vcast lmetal would beother-wise subjected to.

If desirable for 'any spe l'al purpose, the

l' wrought-iron center may be hollow, as a hollosw instead of asolidceuter piece,"A, may b'c u cd.

Having'thus fully described my method-of making rolls for rolling irnand other metals, I would state that I' am aware that a fagot or pile ofvwrought-iron-., such 'as I propose for the center of the roll has beenmade, and this I do notlclaim; but WVhat I de claim as of my invention,and desire tosecure by Letters Patent, is A compound roller made ofWroughtand cast iron, in the manner and for the purpose substantially asherein described. y DAVID REEVES.

' Witnesses: GEO. WALTEEs,

A. B. THOMSON.'

